[llvm-commits] [llvm] r55466 - /llvm/trunk/lib/Target/X86/X86InstrSSE.td

[Evan Cheng]

Author: evancheng
Date: Thu Aug 28 02:52:25 2008
New Revision: 55466

URL: http://llvm.org/viewvc/llvm-project?rev=55466&view=rev
Log:
FsFLD0S{S|D} and V_SETALLONES are as cheap as moves.

Modified:
    llvm/trunk/lib/Target/X86/X86InstrSSE.td

Modified: llvm/trunk/lib/Target/X86/X86InstrSSE.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrSSE.td?rev=55466&r1=55465&r2=55466&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrSSE.td (original)
+++ llvm/trunk/lib/Target/X86/X86InstrSSE.td Thu Aug 28 02:52:25 2008
@@ -458,7 +458,7 @@
 // start with 'Fs'.
 
 // Alias instructions that map fld0 to pxor for sse.
-let isReMaterializable = 1 in
+let isReMaterializable = 1, isAsCheapAsAMove = 1 in
 def FsFLD0SS : I<0xEF, MRMInitReg, (outs FR32:$dst), (ins),
                  "pxor\t$dst, $dst", [(set FR32:$dst, fp32imm0)]>,
                Requires<[HasSSE1]>, TB, OpSize;
@@ -1192,7 +1192,7 @@
 // start with 'Fs'.
 
 // Alias instructions that map fld0 to pxor for sse.
-let isReMaterializable = 1 in
+let isReMaterializable = 1, isAsCheapAsAMove = 1 in
 def FsFLD0SD : I<0xEF, MRMInitReg, (outs FR64:$dst), (ins),
                  "pxor\t$dst, $dst", [(set FR64:$dst, fpimm0)]>,
                Requires<[HasSSE2]>, TB, OpSize;
@@ -2241,7 +2241,7 @@
            (i8 1)), (MFENCE)>;
 
 // Alias instructions that map zero vector to pxor / xorp* for sse.
-let isReMaterializable = 1 in
+let isReMaterializable = 1, isAsCheapAsAMove = 1 in
   def V_SETALLONES : PDI<0x76, MRMInitReg, (outs VR128:$dst), (ins),
                          "pcmpeqd\t$dst, $dst",
                          [(set VR128:$dst, (v4i32 immAllOnesV))]>;